| 1. | Vaccine prepared by traditional method | 
| 2. | Antigens present in the body of humans | 
| 3. | Memory of the immune system | 
| 4. | Site of interaction between antigen and antibody | 
| 1. | lgG is the smallest and most abundant antibody. | 
| 2. | Antigen-binding sites are present at C-terminal of an antibody. | 
| 3. | Natural killer cells are type of lymphocytes associated with innate immunity. | 
| 4. | Cell-mediated immune response is responsible for graft rejection. | 
| 1. | Tissue matching is essential before undertaking any graft | 
| 2. | T-lymphocytes play an important role in graft rejection | 
| 3. | Patient takes immunosuppressants for few weeks only | 
| 4. | Blood group matching is important before transplantation | 
| 1. | Colostrum produced during initial phase of lactation | 
| 2. | ATS injection after a bruise or a cut | 
| 3. | Injection given after the bite of Naja | 
| 4. | Tetanus toxoid under immunization programme | 
| 1. | Through sharing infected needles as in case of intravenous drug abusers | 
| 2. | By sharing clothes between the addicts | 
| 3. | Placental transmission from infected mother | 
| 4. | Unprotected sexual intercourse with an infected person |